2016 Version released September 2016
The PT Delay is a highly characterful delay processor built around the infamous PT2399 chip. It does not aim to compete with clever modern delays (so no microprocessor, tap-tempo, beat-sync, etc.) and instead presents a unique hands-on affair for textural sonic play. With soft-clipping stages, voltage-controlled delay time, powerful equalisation and a true analogue approach, the PT Delay can produce tones akin to tape delays or gnarl down into degraded digital territories. Stand distinct!
The first PT Delay
was released in 2011. When I decided to tweak the design 'just a bit' it ended up taking many months and 10+ prototypes to reach the next stage, but, arriving in mid-2013, the (original) PT Delay Standard ushered in a new era as the first of my 'red module' format designs.
The 2015 version had just a few small tweaks to bring it into line with my other current designs:
- CV input is now 4mm banana with polarizing Depth control.
- Mute controls changed to toggle switches
- Input and Output standardisation including Impedance-balanced Outputs
- Improved bass response on the delay path
- DCDC power conversion is now 'offboard' so the design is a true 'module' (allowing future system integration)
The 2016 version (vs. 2015) is very similar - just a few circuit level tweaks.
[The 'Standard' in the name hinted that I may someday design a 'Deluxe' version - don't hold your breath!]
Designed for typical line level signals with variable amplification up to 20dB. The input features the first of three LED saturation / soft-clip stages - these stages aim to keep internal signal levels to a standardised level so that, for example, overloading the feedback doesn't cause dramatic level changes (instead it overloads into sonic wonders, but without the amplitude running crazy). These clip stages can definitely be used for creative explorations.
Delay Drive / Feedback:
Two controls to determine what goes into the Delay Core, each with Mute switch. The Delay Drive allows bursts of the input sound to be thrown in in true dub-style, while the Feedback (normalised from Delay Out) takes you from single repeat, through washy feedback and into overload.
Voltage Controlled Delay Core:
Delay time is set by a combination of the main Delay Time dial summed with any external Control Voltage (CV) from the CV Input and polarizing CV Mod Depth control. The main control covers times from 35mS to 2.5S, but external CV can take the time longer (up to total digital jittery stop). Delays up to about 300mS (around 1 o'clock on the main dial) are quite clean and from there the digital artefacts start to increase.
The 4mm banana CV input is designed for signals from sources such as Modular Synths (typical 5 to 10V p-to-p levels) - the response is not 1V/Oct for sure! I can supply Interface Cables
Low and High cut filtering (identical to on the PEQ) follows the Delay core - tonally shaping the signals and resulting feedback behaviour.
The main output comes from a mix of Dry and Delayed (Wet) signals. There is also an output of just the Delayed signal which is normalised to the Feedback input - you can insert further external processing here to alter feedback behaviours.
PDF Manual - PTDelay2015
Archive - PTDelay2013
Input - Mono unbalanced 1/4" Jack - impedance 66k Ohms
Outputs - Mono Impdeance-balanced 1/4" Jack - impedance 680 Ohms
CV - 4mm Banana - impedance 100k Ohms
Power - 12V DC 500mA supply, centre-positive, 2.1mm connector.
(worldwide 90-240VAC wall-wart provided with interchangeable mains plug adaptors)
The PTDelay is enclosed in a custom aluminium case (based on the Modular line) with PCB material front and side panels.
Dimensions approx 5.25" x 5" x 3.5"
Two year parts warranty.
£245 (+ VAT in EU -> £294 inc.) + Shipping
Note - these were all made with the 2013 version.
Added on Wednesday 05 June, 2013.